Smoke-jack.



w. REENSTRW.

SMOKE JACK. PPLIOATIOK FILED my?, 1912.

Patentei A115925, 1914,

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VIALTR REENSTROM, OF CHICAGO, ILLINOIS.

Specification of Letters Patent.

Patented Aug. 25, 1914.

Application tiled Hay' i", 1914. Serial No. 836,943.

' ot' this character adapted to efectually serve in the capacity of a safety device to prevent heatingo the structure through which the smoke pipe passes` and which will serve the additional function of a ventilator.

rA--further object is the production .of a device as mentioned which will be of durable and economical construction and which Will be efficient in use.

Other objects will appear hereinafter'.

With these objects in view my invention consists in' the combinations 59nd arrangements oi' parts hereinafter described and claimed.

The invention Will be best understood by reference 'to the "accompanying drawing iorminge part of this speciication, and in wiiich- Figure l is a central vertical section of a smoke jack embodying my invention, the same being shown installed in operative po sition, and Fig. 2 is an enlarged section taken on line -c of Fig. 1.

The preterrerL form of construction as illustrated in the drawing comprises a tubular member or drum l which' projects through the ceiling Q'and roof 3 of the building in which 'the jack is installed. Pro-v vided at the upper cxteriorly projecting end of the member l a hood'fi. Said hood is supported in operative position by arms 5 formed integral with the upper end of the member 1, the upper ends of said arms being secured to said hood by means of rivets 6. The arms 5 resultJ through the Jformation of spaced recessesA 7 in the upper edge of the member 1, said recesses,ater the mounting of flic hood 4 upon the men ber l, constituting ventilation openings as Will be readily understood. rPhe lower edgeofthe fr* projects belovv the recesses or ven ih' openingsi7 so iis'to prevent the direct sage oi air currents theiointo. the hood l serving as a detiector to break up the currents before' entering the member L 0r" course thehood 4 serves the additional function of a deliector for rain. preventing the entrance of the latter into the upper end of the member 1,

Arranged centrally in the member l is the smoke pipe 8, said smoke pipe being of less diameter than the member l, so as to result in the formation of an annular air passage 9 intermediate the same and the member 1, This annular passage 9 serves the double function of an air passage Jfor ventilation purposes and also asy an insulating jacket to prevent heating of the structure throu h' which the smoke pipe passes. The smo ye pipe is secured in central position in the member 1 by means ct' rings l0 which embrace said pipe, said rings being rigidly secured in position by arms 11 projecting inwardly from the member l as clearly shown in Fig. 2.

The upper end of the hood 4 is provided With an opening of a diameter such as to snugly receive the upper end ot the smoke oipe 8. Arising from said end of said hood is a tubular extension 12 at the upper end of Awhich is provided a conicahhood 13. Said .hood 13 is positioned iu registration with the upper edge of extension 1.2, being pro# vided with a depending flange ll at the centralvfopening therein which snugly embraces the upper end of said extension. The lower edge of said "ange is supported upon an annular lil-ad 15'; provided at the upper end of said-extension., said flange being securely held invposition between said bead and an outwardly projecting Hangs 1G provided at the upper end ci extension 12 which engages over the upper side of the hood 13 as shown.

Spaced above the hood 13 is a cap 17 of a upper end of extension l2 will result in improving and accelerating the draft in the smoke pipe.4 The integral construction of the arms` 5 and 18 results in a strong and durable arrangement as .vell as one which is economical and struction employing separate supportingv diameter the same as that of said hood, said 95.

less expensive than a con 110 enst arms for this purposelwhich are secured es by riveting at their lower ends to the pipe or tubular member from which they arise.

lWhile l have illustrated and described the preferred form of construction for carrying' my invention into eieet, this is capable or variation and modification Without de arting from the spiritoi thcinvention. Li erefore, do not Wish to be limited to the precise details of construction set forth, but desire to avail myself of such variations and modifications as come within the scope oit/the appended claims.

Having described my invention what claim as .new and desire to secure by Letters Patent is: I

l. A device of the class described comprising a tubular member; a smoke pipe of less diameter than said tubular member extending through the latter; means for eentering said smoke pipe in said tubular member; a conical hood at the upper end of said tubular member, there being openings at the upper end of said tubular member below said hood; and a tubular extension at the upper end of said tubular member of less diameter than the latter in which the upper end of said smoke pipe snugly lits; substantially as described;

2. A device of theV class described comprising atubular member; a smoke pipe of less diameter than said tubular member extending through the latter; means for centering said smoke pipe in said tubular member, said means comprising a ring embracing said smoke pipe; and arms having their outer ends rigidly secured to saidtubular member and having their inner ends connected with said ring for rigidly supporting the latter, substantially as described.

3. A device of the class described comprising a tubular member; a smoke ipe of less diameter than said tubular mem er extending through the latter; means for centering said smoke pipe in said tubular mem- Liemeer;

ber said means comprising means embracing said smoke pipe; arms inwardly prejecting from said tubular member for supporting said embracing means; and a conical hood at the upper end of said tubular member, there being openings at the upper end of said tubular member below said hood, sub- 'of said hood, substantially as described.

A device of the class described comprising a tubulur. member; a conical hood.

arranged at the upper end of said member; the upper end of said member being recessed to form supporting arms for said hood and to constitute ventilation openings between said arms at the underV side of said hood, substantially as described.

6. A device of the class described com prising a tubular member; a conical hood arranged at the upper end of said tubular member, said hood having a central opening at its upper end; an annular iiange provided at said opening' embracing said tubular member; a bead on said tubular member with which the lower end oi said flange engages; and an outwardly turned flange at the upper end of said tubular memberiSO engaging over the upper side of said hood around the opening therein, substantially as described. 4

ln testimony whereof I have signed my name to this specification in the presenceof two subscribing witnesses.

VALTER REENSTROM. Witnesses:

JOSHUA R.' H. Porre', ARTHUR A. OLSON. 

